Reactions of molecular dications:: collision energy dependence of integral cross-sections of processes in CHCl2++Ar, D2 systems from guided beam studies

Collision energy dependence of integral cross-sections of charge transfer processes and chemical reactions in the system CHCl2+ + Ar and CHCl2+ + D-2 was investigated in guided beam experiments. Both singly charged reaction products resulting from non-dissociative charge transfer and chemical reactions in these systems could be identified, in the former system CHCl+, Ar+; CCl+, ArH+, in the latter CHCl+, D-2(+); CHDCl+; CCl+, HD2+. The identification of ArH+ and HD2+ helps to specify the reaction of CCl+ formation as a proton transfer process from the dication CHCl2+. The integral cross-section for the charge transfer process with Ar was almost independent of collision energy and its value was close to 2 Angstrom(2); the cross-sections for the chemical reaction of CCl+ formation with Ar was about 6Angstrom(2) and showed an increase at low collision energy. The integral cross-section of the reactions with D2 were of the same order of magnitude as those with Ar. (C) 2003 Elsevier Science B.V. All rights reserved.